1N5221B-1 thru 1N5281B-1 Available on commercial .
1N5270B - Zener Diodes
1N5270BUR-1 - METALLURGICALLY BONDED GLASS SURFACE MOUNT 500mW ZENERS
1N5270B - ZENER DIODES
1N5270B - Zener Diode
1N5270B - SILICON PLANAR ZENER DIODES
1N5270B-1 - ZENER DIODES
1N5270B - SILICON ZENER DIODES